Pick-out device for looms



Dec 18, 1928.

O. V. PAYNE PICK OUT DEVICE FOR LOOKS Filed, March 1927 Oscar F gyxze kfltiqdrfii,

pears to Patented Dec. 18, 1928.

units! STATES PATENT OFFICE."

OSCAR v. 1 AYNE, OF WORCESTER, MASSACHUSETTS ASSIGNOR rocironrron a KNOWLES LOOM WORKS, OF WORCESTER, IVIASSACHUEETTS,

MASSACHUSETTS.

A COBPORATIOYLT OF PICK-OUT DEVICE FOR L OOMS.

Application filed March 2, 1927. .Serial No. 172,156.

It is usual practice for a weaver to begin picking-out operations by reversing the takeup motionto cause slack in the cloth, after which the picks laid subsequent to a mispick are taken out oneat a time by reversing the harness motion. After removing the last faulty pick the weaver advances the take-up until the tension on the cloth apbe that originally existing before the pick-out. The Weaver must depend 'upon his judgment in establishingthe tension and unless the cloth is subjected to the original strain prior to the pick-out there will be either thick or a thin place inthe cloth depending upon Whether the restored cloth is too slack or too tight. 7

It is an important objectof my present invention to provide means preferably manually operated for automatically producing a given'amount of slack after Wl'llClI the take-up will be driven reversely during the picking out operationto keep the fell behind its normal position by the same number of picks. After removing the last pick the cloth is advanced the amount by which it was originally slackened.

It is a further ob ect of my mvention to provide a positive reverse take-up of the type shown in patent to Ryon No. 810,680 for a loom such as that shown in Reissue Patent No. 7,784, the take-up having a rack and gear arrangement normally inoperative but effective at the time of pick-out to reverse the take-up a given amount, therack then passing beyond the gear to freethe take-up for further reverse movements in time with the harness motion.

Picking-out operations are ordinarily carriedon in one of two ways, depending on the extent of the pick-out. If only a few picks are to be removed the weaver will usually leave the cloth tight and reverse the head to open the sheds in an orderthe reverse of that in which they opened while weaving. hen a positive reverse take-up is used the take-up roll will turn back an amount substantially equal to the picks removed. In certain classes of work, such as silk, the fell of the clothafter the pick-out is not exactly where it was before the pickout, due to lost motion in the reversing mechanism. i

Then a large number of picks are to be taken out, on the other hand, the cloth is slackened and the harnesses evened so that all the warps lie in the same plane. The filling is then loosened one pick at a time by means of a comb and withdrawn, the take-up not being reversed. After the faulty picks are removed the take-up roll is advanced to absorb as much of the original slack aswillbe necessary to give the new fell its proper position, after which the warp beam is reversed to tighten the warps. This operation requires skill and much time is consumed in reestablishing the original tension.

It is found that the cloth between the takeup roll and the breast beam can absorb a certainamount of .slackness or tension which is not passed on to the cloth between the breast beam and fell until weaving under power is resumed. Itis an important object of my invention to insure an advance movement of that part of the clothbetween the,

take-uproll and breast beam similar .to that which occurs under weaving conditions.

My invention further relates to the method of making a pickout, andmore particularly to the step in the method which rcquires the cloth to be subjected to an advance movement before weaving can be resumed.

With these and other objects which will appear as the description proceeds, my inventlon relates to combinations and arrangements of parts hereinafter set forth, and v more' particularly pointed out in the claims,

In the accompanylng drawings, wherein a convenient embodiment of my invention is shown, I I i Fig. 1 isa side elevation showing a loom with my invention applied thereto and the parts in normal runningposition, 7

Fig. 2 is a horizontal section online 2-2 of Fig. 1,

Fig. 3 is an enlarged detailed section on line 33 of Fig. 1, I f

Fig. 4 is a reverse view of thesegment member showing the cam groove,

Fig. 5 is a view similar to a portion of Fig.

l'but' showing the parts in the position they assume while the device is being put into operation, and

Fig. 6 is a view similar to Fig. but With the device moved completely to reversing .position.

Referring to the drawings loom frame 10 has supported on the rear end thereof a warp beam 11 from which extends the warp W. Any approved let-otf 'iechanism may be employed. a friction type being shown herein and comprising a weightel lever 12, a flexible friction band 13 and a friction drum '14.

'l hetake-up motion may include stake-- up roll 15 around which the cloth C wound, said roll moving with a gear 16 which meshes with a pinion 17. The latter in 'turn meshes with another pinion 18 fast with a large worm gear 19. Thelatter cooperates with a worm 20 secured. to ahorizontal shaft 21' rotatable in front and rear bearings 22 and '23, respectively. A spur gear 24 secured to the shaft 21 meshes with a pinion'25'secured to a short shaft'26'to the rear end of which is secured a bevel gear 27. p

An upright shaft 28 has loosely-mounted onthe lower end-thereof bevel gear 2. which meshes with another bevel gear 30 secured toa horizontal shaft 31. The'latter shaft is drivenby mechanism not shownbut well understoodffrom'the bottom Sll'ilft'Oif the loom (not shown), and said shaft 31receives a rotation every pickof the loom to drive a patternmechanism which may be similar-to the 'well 'known Knowleshead as shown in Reissue Patent No. 7;784.

The "horizontal shaft 21 is i driven positively from the upright shaft 28 by meansof a sleeve 32 slidable along but keyed to the shaft 28. Said sleeve has fastened thereto spaced upper and lower'bevel gears 33 and 34 which move together as the sleeve slides. "Under normalconditions bevel gear 33 'isrin .mesh :with the bevel 27 so that the latter through gears 24 and25 will drive the shaft 21 to cause such a rotation of worm 20 as will give the take-up roll 15 a slight advance movement every pick of the loom. Under these conditions bevelgear3 lisout of mesh with bevel gear 27.

In order to disconnect the upright shaft 28 from shaft 31 I use the ordinary clutch indicated'in Fig. 1. Said clutch has a collar 35 fastenedlo the shaft 28 anda slide 36 movable verticallyby a manually operalilelever 37. The slidehas a-pin 38 which normally extends through the collar and into driving conection with bevel gear 29. heir the slide is raised the pinmoves away from gear 29 andthe shaft 28 is free to-move in dependently of shaft 2 l. This dr connection is similar to that slio'i'vn inpatent to Knowles No. 134,992. The marterthus far described is old and may be substantially the same as shown in'the aforesaid patent to By on.

In carrying my improvements into effect I secure abevel pinion 50 to the shaft 21 and provide a segment '51, which is pivoted to the loom frame at 52. Said segment-has a iraclz 53 normally out of engagement with the pinion 50 but adapted for cooperation therewith. A handle 54- is secured to the segment 51 and is normally sprung into the forward hotel r55=ofIan-arcuate guide 56 secured-to the loom frame, and having a second handle receiving notch 57 at the rear end thereof.

A bell crank lever 58 pivoted to the frame of'thelooinand has ashorizont-al arm which cooperates with a grooved collar 59 secured to the sleeve 32 to cause movement of the latter. The depending arm 60 of said 'leven58 has a laterally projecting stud G1 which-enters alcam groove62 formed :in the segmentol. Said groove hassa lowrun -63, an intermediate dwell64,=and higher .run 65. Said grooveisforinedin apor on of the segment which stands upwardly from thebody otthe latter as at66 of Fig. 3.

\Vhen the weaver is to make a pick-out the connection between ithe upright shaft 28 and the loom will be thrown out of opera- *tion in the well known ananner by lifting slideBGi The handle 5% will then be sprung out ofnotch 55 and moved rearwardly', assuming during this=operation an intermediate position such as that indicated in 5. During the first part'ofthis movement the studfilwill be moved from the low'to the intermediate part of the groove, thus raising-tliegear 33 away from engagement withbevel gear-'27. Atithesametime "ment 53=engages pini0n '50and causes a rotation of horizontal shaft 21 in a reverse direction. As the handle 54 is moved rearwartlly the stud 61 will remain :in th'e intermediate or dwell portionofthecam groove. "and the rack '53 willcontinueto produce reverse movement of shaft2'1. The result of this-operation is to reverse the takeaip :roll s0 as-to letthecloth back and slackcn the same a definite :Inredetermined amount to facilitate I the piclring ouh operation. As the handle 54 nears the end of its rearward movementstud 61 willienter the high portion of the cam groovesoi'as toicomplete the upwardmovement of slide32 and causeen. gagement between mitre gear 27 on the shaft-26 and=the:lowermitreugear 34: on the sleeve. As this :happens the winch will move out of engagement with-pinion-50-and control of'the'horizontal shaft 21 will pass from-the segment 51ito the uprightshaft 28. In this way the cloth :is let back a definite amount and the weaver may proceed with the picking-out operation Bynnechanisnrnot shown hereinbut indicated in the aforesaid patent to Ryon, the

the segment pattern mechanism is reversed one pick at a time causing the harnesses to open the sheds in reverse order so thatthe pieksof filling may be removed. Each time a pick of filling is taken out shaft 28 will be given a complete rotation, and the take-up roll will therefore be'given a reverse movement equal to one pick. In this way the take-up roll 15 is moved backwardly an amount corresponding to the number of picks removed. At the end of the pick-out operation therefore the relative difference between the take-up roll and the fell of the cloth will be the same number of picks as the .take-up roll was originally reversed by" the segment In' order to restore the parts to normal position the weaver will spring the handle 54: out of the rear notch "57 and move the same to its extreme forward position, during which movement the sequence of movements will be the reverse of that previously described. Mitre gear 27 will be returned to its normal operative position with respect to mitre gear 33 as the sleeve 32 moves downwardly. During the return movement of 53 horizontal shaft 21 is given an advance angular movement to move the take-up roll 15 forwardly a distance equal to the amount by which it was reversed during the first part of the pick-out operation. For this reason the slack in the cloth is taken up and the cloth and warp are subjected to the same tension as existed prior to the pick-out operation. In this way assurance is given that the cloth between the breast beam 13 and the roll 15 will be advanced so that any tendency of the cloth to hold back while going around the breast beam which might otherwise occur will be eliminated.

The Knowles worsted loom to which the invention more particularly relates has a friction let-off and the operator would be required to turn the loom back manually after the pick-out operation. It is thought sufficient for the purposes of the present disclosure to state that the warp beam will be turned back in the usual manner, that is, by hand after the defective picks have been removed.

From the foregoing it will be seen that I have provided means for producing a definite amount of slack in the cloth prior to the pick-out operation, and that the takeup roll is reversed in timed relation with the loom as the latter is turned backwardly pick by pickvto remove the deflective filling.

In this way I am enabled to restore the cloth to its original tension merely by a reverse movement of the parts which produced the slack; It will further be seen that the production of the slack is'automatically attended by a reversal of the driving connections for the take-up roll, thus insuring that the take-up and fell of the cloth; will be kept in step with each other and that the interval represented by the number of picks between the fell of the cloth and the reverse position of the take-up roll will be preserved constant'during the picking-out operation.

Furthermore, it will be that I have introduced the step in the methodv of making .a pick-out which requires the weaver to ad- 'vance the cloth after a pick-out to place that part of the cloth nearest the take-up roll under the same tension asexisted before the pick-out. 7

Having thus described my invention it will be apparent that changes and modifications may be made without departing from the scope and spirit of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: I

1. In a take-up for looms, a take-up roll,

means always in operative connection with said roll to rotate the same either forwardly or baokwardly, and a device acting conjointly with said means to give the roll a predetermined reverse movement when changing from forward to backward rotation while the means is operatively connected to the take-up roll.

2. In a take-up for looms, a takeup roll, means to drive the take-up roll forwardly,

additional means to drive the roll backwardly, and means to give the take-up roll a predetermined reverse movement and to thereafter connect the roll operatively with the additional means.

3. In a take-up motion for looms, a takeup roll, a member moving constantly in the same direction, means connected to the member to drive the roll forwardly, additional means capable of operative relation with the member to drive the roll rearwardly, and control mechanism for said additional means effective to give the roll a predetermined reverse movement and at the same time disconnect the means from the member and establish operative relation between the additional means and the member.

4:. In a take-up for looms, a take-up roll, a driving means capable of assuming two positions in one of which said means is operative to drive the roll forwardly and in the other position of which said means is operative to drive the roll backwardly, and devices for changing the position of said means to render the same effective to drive the roll backwardly and simultaneously giving said take-up roll a predetermined reverse movement.

5. In a take-up for looms, a take-up roll,

a constantly moving driving member, con-' wardly, and when in an intermediate position to disconnect the driving means from the roll, and manually operable means lfOl movingsaid device from forward to backward driving position and to eii ect a predetermined reverse movement of the roll when the driving means is disconnected from said dev'ce.

6. In a take-up mechanism for looms, a take-up roll, a constantly moving driving member, connections between said member and the rollQs-aid member and connections capable of assuming three relative positions in one of which said vmember isoperative to drive the roll forwardly, in another of which said member isetlective to drive the roll backwardly, and in the intermediate positionbeing out of operative contact with the roll, means manually operable to give said member and connections the aforesaid three relative positions and effective to give the take-up roll a predetermined reverse movement while the'member and connections are in intermediate position with respect to each other.

7. In a take-up mechanism for looms, a take-up roll, meansto drive said roll forwardly additional means to drive said roll backwardly, a manually operated means effective to give the take-up roll a predeter mined reverse movementbefore said roll is moved backwardly by the additional means, and efl'ective also to give stud take-up roll a predetermined forward movement aiter said troll has been moved backwardly .by the additional means and before said .roll is movedbackwardly-bythe first-named means.

8. In a take-up mechanism for looms, a take-up roll, means to drive said roll in opposite directions by power, means'movable to effect a reversal of the direction .of

rotation otthe roll, and manually operable means toeifect a predetermined :movement of saidroll while said member is moving to eifect reversal of the of said roll.

9. -In .a,-tal e-up mechamsm for looms, a

direction of rotation take-up roll, means to drive the takeaip roll i'orwardlyand backwardly by power means to effect a predetermined reversal-oi. thetake-up :roll prior-to a pickout operation, saidimeans being also etiectiveto producea forward movement otthe take-up roll equal in amount to the predetermined reverse a predetermined reverse movement when changing from forward to :backward rotation while the means is operativelyconnected to the take-up roll.

In testimony whereof I have hereunto afiixcd my signature.

OSCAR V. PAYNE. 

